Bleeding on my ovulation day

Kayla • I`m 27 and my Husband is 32 we`ve been trying for a few years to get pregnant with no luck! Hopefully soon!
So Sunday was one of my major ovulation days, so me and my husband planned on some lovin'! But I started bleeding! Now I have NEVER had any irregular bleeding. And it was gone by morning. Can someone give me some hints or advice as to what was going on?